In Japan, we often use a World Heritage Site to gather visitors. However in New Zealand, they limit the number of visitors to a World Heritage Site to protect it. In Yakushima, the increasing number of cars has caused bad effects, including paved mountain trails. Overconstructing roads must have made this artificial nature. We should have the same idea as New Zealand. Milford Track and Routeburn Track in New Zealand limited the number of visitors; not so many people can get there per a day.
The world heritage treaty has no penalty. However, each country has each own law and institution about it. So, if you broke a world heritage, you would be punished by the law of the country.
